Fw: [vtkusers] vtkCoordinate and a simple test program

[Isidro Moreno]

Mark,

    SetWidth() and SetHeight() methods (vtkProp's methods),define the 
dimensions of the rectangle in which the line is drawn (it could be not a 
line, but also a circle, a polygon, etc.). In fact, that rectangle is which 
I want to autoscale when window's size changes. As a result, the line would 
fit to it. That's what I've understood till now. But I could be wrong...

Isidro


>I thought all coordinates are mapped directly to the opengl coordinate
> system unless you're doing it in 'screen coordinates' of the VTK
> render window - I think for example some of the caption actors use
> that.
>
> As for the line thickness, I thought there was a different property of
> the line to set (setting the actor width height won't change anything)
> - something along the lines of:
>
>    your_line->GetProperty()->SetLineWidth(5000000);
>
> SetLineWidth() seems to be a method of vtkProperty.
>
> I haven't worked with VTK in a few months but I hope my vague memories
> help a bit,
>
> Mark
>
> On 6/26/07, Isidro Moreno <morenoisidro at yahoo.com.ar> wrote:
>>
>>
>> Hello! I've made a simple VTK/C++ test program. It's just a 2D line. Now, 
>> I
>> don't know how to make the line size change. I've tried many methods; and
>> changing vtkActor's coordinate system (vtkActor2D's), but no results. I 
>> even
>> wonder what coordinate system is vtkLineSource defined in (see code 
>> below).
>>
>> Here's my code:
>>
>> vtkLineSource *line=vtkLineSource::New();
>>     line->SetPoint1(20.0,20.0,0.0);    // what Coordinate System??
>>     line->SetPoint2(80.0,150.0,0.0);  // what Coordinate System??
>>
>> vtkPolyDataMapper2D *mapper=vtkPolyDataMapper2D::New();
>>     mapper->SetInput(line->GetOutput());
>>
>> vtkActor2D *actor=vtkActor2D::New();
>>     actor->SetMapper(mapper);
>>     actor->GetProperty()->SetColor(1.0,0.0,0.0);
>>     actor->SetWidth(0.5);    // Doesn't work!!
>>     actor->SetHeight(0.5);   // Doesn't work!!
>>
>> vtkRenderer *render=vtkRenderer::New();
>> vtkRenderWindow *win=vtkRenderWindow::New();
>>     win->AddRenderer(render);
>>
>> vtkRenderWindowInteractor
>> *interac=vtkRenderWindowInteractor::New();
>>     interac->SetRenderWindow(win);
>>
>>     render->AddActor2D(actor);
>>     render->SetBackground(0.1,0.2,0.4);
>>
>>     win->Render();
>>
>>     interac->Initialize();
>>     interac->Start();
>>
>> line->Delete();
>> mapper->Delete();
>> actor->Delete();
>> render->Delete();
>> win->Delete();
>> interac->Delete();
>>
>> I want to make the line resize when changing windows size. I'd be very
>> grateful if somebody could help me with this. Thanks!!!
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>
>
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